语法综合练习题写出下列单词的复数形式city. 2.key.
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写出下列单词的复数形式

city.cities 2.key.-keys 3.mouse.- mice 4.bus.- buses 5.English.- Engish 6.sheep.- sheep 7.tomato.- tomatoes 8.brush.- brushes 9.knife- knives

写出下列单词的单数形式

children.- child 2.butterflies.- butterfly 3.men.- man 4.leaves.- leaf 5.potatoes.- potato 6.feet.- foot 7.babies.- baby 8.glasses.- glass 9.Monkeys- monkey

写出下列单词的单数第三人称,过去式和现在分词形式

1.go.- goes - went - gone

2.write.-writes - wrote - writing

3.do.- does - did - doing

4.leave.- leaves - left - leaving

5.buy.- buys - bought - buying

6.stop.- stops - stopped - stopping

7.have.- has - had - having

8.Swim.- swims - swam - swimming

9.sing.- sings -sang - singing

10.know- knows - knew - knowing